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Mastering Graphics Programming with Vulkan
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The technique we have implemented in this chapter is detailed in Chapter 13, Revisiting Shadows with Ray Tracing, of the book Ray Tracing Gems. It is freely available here: http://www.realtimerendering.com/raytracinggems/rtg/index.html.
We have only used a limited set of the GLSL APIs available for ray tracing. We recommend reading the GLSL extension specification to see all the options available:
We used a few filters in this chapter. Signal processing is a vast and wonderful field that has more implications in graphics programming than people realize. To get you started, we recommend this article by Bart Wronski: https://bartwronski.com/2021/02/15/bilinear-down-upsampling-pixel-grids-and-that-half-pixel-offset/.